The PromoKine PCR Labeling Kits and Nick Translation Labeling Kits have been designed for convenient direct DNA labeling by PCR or nick translation using Taq polymerase or Polymerase I/DNase I. The fluorescently labeled dUTP analogs provided with the kits have been optimized for enzymatic incorporation into DNA by using a proprietary linker technology. The high incorporation rates of the dye-dUTP analogs combined with the outstanding stability and quantum yield of the fluorophores make the kits the ideal choice for all typical DNA labeling applications such as FISH, single molecule detection, microarray gene expression profiling, and other nucleic acid hybridization assays.